<template>
  <div class="App">
    <h3 class="App">App组件</h3>
    <Show />
  </div>
</template>

<script>
import Show from "@/components/Show";
export default {
  name: "App",
  components: {
    Show,
  },
};
</script>

<style scoped>
.App {
  color: aqua;
}
/* 选择穿透 */
.App >>> .App {
  color: red;
}
</style>
  
